proposisional
Proposisional is an adjective referring to propositions—statements that can be either true or false. In English, the more common form is propositional; proposisional appears as a variant used in some scholarly contexts to denote relation to propositions or propositional content.
In logic, the term pertains to propositional or sentential logic, where the basic units are propositional variables
In philosophy, “propositional” relates to the content of statements—their propositional content—rather than to the sentence form
Differences from related terms are subtle: a proposition is the abstract content; a proposition is the statement
See also: propositional logic, proposition, propositional attitude, propositional content.